Beeper brings 15 chat platforms including Telegram, WhatsApp, Signal, and Facebook Messenger, into a single inbox. You can chat, search, and archive through chat of any of these platforms on Beeper. The app also helps in bringing iMessage to Android, Windows, and Linux users.

source https://gadgets.ndtv.com/apps/news/beeper-whatsapp-signal-telegram-imessage-15-chat-apps-single-inbox-pebble-eric-migicovsky-2356434#rss-gadgets-all